Date: Thu, 27 Sep 2012 11:05:46 -0700 From: Rudy <crapsh@monkeybrains.net> To: freebsd-net@freebsd.org Subject: Re: ping: sendto: No buffer space available Message-ID: <5064957A.6050709@monkeybrains.net> In-Reply-To: <50649457.4050701@monkeybrains.net> References: <5060884C.3050709@monkeybrains.net> <506154C7.3040209@sepehrs.com> <50615F6F.1070105@monkeybrains.net> <50616D5C.705@gmail.com> <50649457.4050701@monkeybrains.net>
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On 09/27/2012 11:00 AM, Rudy wrote: > On 09/25/2012 01:37 AM, Hooman Fazaeli wrote: > >>> dev.em.1.link_irq: 6379725883 > >>> dev.em.2.link_irq: 6379294926 > > >> Based on the strangely high value of dev.em.1.link_irq (which means too >> many link >> status changes: down -> up -> down -> ....), I guess the problem is the >> same as >> discussed in these threads: >> >> http://lists.freebsd.org/pipermail/freebsd-net/2011-November/030424.html >> http://lists.freebsd.org/pipermail/freebsd-net/2012-March/031648.html >> >> To confirm, you may run this test: >> >> 1. Start a ping flood: ping -f <other-machine-ip> >> 2. Let it run for a few seconds. >> 3. Disconnect the cable. >> 4. After a while, you should see "no buffer space" error. >> 5. Stop ping flood. >> 6. Re-connect the cable and wait 10 seconds. >> 7. Start a normal ping. Error messages should show up again. >> >> To fix, upgrade to the latest e1000 driver from HEAD. >> >> The very high link_irq may be due to a loose connection. >> Replace the patch cord and see if it helps. > > Thanks for the tips. I will test next time I am at the data center. For > now, I rebooted after doubled the default nmbclusters and quadrupled the > hw.em.rxd values in loader.conf. > > # loader.conf > kern.ipc.nmbclusters=524288 > hw.igb.rxd=4096 > hw.igb.txd=4096 > hw.em.rxd=4096 > hw.em.txd=4096 > > Rebooting and/or the settings change seems to have stopped the errors. > Here is a pretty little graph showing error rate on em1 for the past 3 > days. > > http://www.monkeybrains.net/images/ErrorRate-em1.png > > Rudy > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" >
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